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J. A. STRAIGHT GAS REGULATOR POR VULOANIZERS, Gac.

u. PETERS. Plwwmnugm'mr. wmmgm. D. c.

y UNITED A STATES PATENT OFFICE.

JOHN A. STRAIGHT, OE ALBION, NEW 'YORK GAS-REGULATOR FOR VULCANIZERS, 84C.

SPECIFICATION forming part of Letters Patent No. 261,640, dated July 25, 1882.

Application led November 11, 1881. (No. mode1.)

To all whom it may concern:

Be it known that I, JOHN A. STRAIGHT, of the village ot' Albion, in the county of Orleans and State of New York, have invented a new and useful Regulator for the Flow of Gas for Dental Vulcanizers and other Steam-Gene rators, of which the following is a speeitication.

My invent-ion relates to improvements in gas-regulators in which the pressure of steam is used to regulate the How ot' gas; and the object of my improvement is to provide a regulator that shall be easily adjusted and not liable to get out of order. I attain this object by the mechanism illustrated by the accompanying drawings, in Which- Figure 1 is a vertical section of the device; and Fig. 2 is a transverse section taken on line a: a', Fig. 1.

In the drawings, A is a tube, of rubber or other elastic material, attached to a'ribbed nipple formed on the support G, which support is bored axially and screwed on a siphon-tube, J, communicating with the steam-room of a vulcanizer or other steam-generator, completing a continuous passage from the steamroom of the vulcanizer or generator to the upper end ot' the elastic tube A. The upper end of the elastic tube A is closed by a metallic plug, B, to which it is securely fastened by a wrapping ot' wire, or by any other known means. The portion ot' the plug B outside of the elastic tube A is of the same diameter as the said elastic tube, and is bored axially from the top, and is threaded internally to receive the adjusting screw E. The elastic tube A is surrounded aud inclosed by a spiral spring, D,

attached to the support C and extending be yond the plug B, where it is contracted, so as to engage the upper end of said plug and oppose the tendency of the elastic tube to elongate under steam-pressure. The spiral spring D, furthermore, supports the elastic tube A against lateral pressure. A metal tube, F, screwed on the support C, incloses the elastic tube A and spiral spring D, and, extending beyond the plug B, is closed by a centrally-apertured cap, through which the adjusting-screw E projects. Surrounding the upper end. of the tube F there is a collar, I, provided with one or more set-screws, and having two arms, g g',

extending upward parallel with the tube F, and apertured to receive the metal tube G, the said tube being arranged at 'right angles to the arms g g' and inclosin g the flexible gas tube H. The tube G is cut away in the middle of the under side at a a to expose the tiexible tube H to the action of the screw E. Any kind ot a gas-valve capable of being operated by pressure may be substituted for the tube H.

Although I have described the elastic tube A as being provided with a spiral spring, D, I do notcontine myself to this construction, as the spiral spring may be dispensed with, when the elasticity of the rubber alone will oppose the pressure of the steam and instead of employing the adjusting-screw E, as described, I may elongate the plug B and reduce the upper en d in diameter and substitute the elongated part for the screw E, when the adjusting of the device will be eiiected by moving the tubes H Gr up or down by changing the position of the collar I on the tube F.

The regulator being connected with the vulcanizer by suitable pipes, the gas is turned on atthe'supply-pipe and'passes through the gas- -tube H to the burner under the vulcanizer.

When steam forms in the chamber ot' the vulcanizer the pressure in the tube A causes it to elongate and carry with it the plug B andthe regulating-screw E. When the pressure in the vulcanizer arrives at the prescribed limit the screw E presses against the exible gastube H through the opening on the under side of the tube Gr, reducing the iiow of gas by compressing the gas-tubeH against the upper side of the cut-oft' tube G. If the pressure in the vulcanizer is too great, the flow of gas is reduced, and as a consequence the pressure is reduced in the vulcanizer, allowing the flexible tube A to retract and withdrawthe screw E from the tube H, relieving it, so that the flow of gas is just suicient to keep the pressure at the point required for vulcanizingproperly.

What I claim as my invention, and desire to secure byLetters Patent, is

1. In a steam operated gas -regulator, the

IOO

regulator, of the tube A, support C, plug B, regulator, of the tube A,support O,p1ug B,eut the coilspriug D, and iiexible gas-tube H, sub off tube G, gas-tube H, arms g g', and ring I, 1o

stantially as shown aud described.

all substantially as shown and described, and

3. 1u a. steam -operated gas regulator, the fox` the purpose specified.

5 spiral spring D, in combination with the elastic tube A, the said elastic tube being iuelosed by the spiral spring, substantially as specified.

4. Thecombiuation, iu a steam-operated gas- JOHN A. STRAIGHT. Witnesses:

H. M. HOPKINS, GEO. M. HOPKINS. 

